This duty is enhanced, when we consider that it is the consequence and sequel of an unparalleled war. At a moment of peace such a duty would be commanding; but it is now reinforced by exceptional considerations arising from the exceptional condition of affairs. For four years, Rebellion, of the greatest magnitude known to authentic history, raged among us, threatening to rend the Republic in twain. Millions of treasure were sacrificed. Lives more precious than any treasure were heaped in hecatombs. Families were filled with mourning. In the terrible struggle, while the country was bleeding at every pore and the scales of battle hung doubtful, assistance came from an unexpected quarter. Intermixed with the false men who warred on the Republic were nearly four million slaves, shut out from rights of all kinds, and compelled to do the bidding of masters. These slaves became our benefactors. They were kind to our captive soldiers, sheltering them, feeding them, supplying their wants, and guiding them to safety. Thus in the very heart of the Rebellion there was a filial throb for the Republic. At last arms were put into their hands, and two hundred thousand brave allies, representatives of an unmustered host, leaped forward in defence of the national cause. The Republic was saved. The Rebellion was at an end. Meanwhile the good President who at that time guided our affairs put forth his immortal Proclamation, declaring that these slaves “are and henceforward shall be free”; and not stopping with this declaration, he proceeded to announce that “the Executive Government of the United States, including the military and naval authorities thereof, will recognize and _maintain_ the freedom of said persons.” Thus was the Republic solemnly pledged to these benefactors, first, by ties of gratitude that should be enduring, and, secondly, by an open promise in the face of the civilized world. And this pledge was taken up and adopted by the people of the United States, when, by Constitutional Amendment, they expressly empowered Congress to maintain this freedom by appropriate legislation.